Problema 3. Una lancha desea atravesar perpendicularmente a un río de 50 m de ancho. Al realizar la travesía, la corriente del río desplazó a la lancha 40 m; ¿Cuántos grados se desvió la lancha debido a la corriente del río? ¿Cuántos metros recorrió la lancha durante su travesía?

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

Visualize the problem and identify special cases first examine the problem by drawing a picture and visualizing the motion. apply newton's 2nd law, ∑f⃗ =ma⃗ , to each body in your mind. don't worry about which quantities are given. think about the forces on each body: how are these consistent with the direction of the acceleration for that body? can you think of any special cases that you can solve quickly now and use to test your understanding later? one special case in this problem is if m2=0, in which case block 1 would simply fall freely under the acceleration of gravity: a⃗ 1=−gj^.

To fully describe the photoelectric effect, scientists must consider which of the following to be quantized? o a. both light and matter o b. matter only o c. light only o d. neither light nor matter